89 lines
1.8 KiB
C
89 lines
1.8 KiB
C
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/**
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* Print a human readable timestamp to the terminal
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* given a number representing seconds
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*
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* Author: Dave Eddy <dave@daveeddy.com>
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* Date: 8/18/2014
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* License: MIT
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define FROM_NOW "from now"
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#define AGO "ago"
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static char *names[] = {"year", "month", "week", "day", "hour", "minute", "second"};
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void usage(FILE *stream) {
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fprintf(stream, "usage: human <seconds> ...\n");
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fprintf(stream, "\n");
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fprintf(stream, "options\n");
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fprintf(stream, " -h print this message and exit\n");
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fprintf(stream, " -s include a suffix like \"from now\" or \"ago\"\n");
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}
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void human(int seconds, int dosuffix) {
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char *suffix = FROM_NOW;
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if (seconds < 0) {
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seconds *= -1;
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suffix = AGO;
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}
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int times[] = {
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seconds / 60 / 60 / 24 / 365, // years
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seconds / 60 / 60 / 24 / 30, // months
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seconds / 60 / 60 / 24 / 7, // weeks
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seconds / 60 / 60 / 24, // days
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seconds / 60 / 60, // hours
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seconds / 60, // minutes
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seconds, // seconds
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};
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for (int i = 0; i < (int)(sizeof(times) / sizeof(*times)); i++) {
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if (times[i] == 0)
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continue;
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if (times[i] > 1)
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printf("%d %ss", times[i], names[i]);
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else
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printf("%d %s", times[i], names[i]);
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if (dosuffix)
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printf(" %s", suffix);
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printf("\n");
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return;
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}
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printf("right now\n");
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}
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int main(int argc, char **argv) {
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int dosuffix = 0;
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if (argc <= 1) {
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usage(stderr);
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return 1;
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}
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// purposefully avoid getopt, because it will try to read
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// negative numbers as arguments
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if (strcmp(argv[1], "-h") == 0 || strcmp(argv[1], "--help") == 0) {
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usage(stdout);
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return 0;
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}
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if (strcmp(argv[1], "-s") == 0 || strcmp(argv[1], "--suffix") == 0) {
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dosuffix = 1;
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argc--;
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argv++;
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}
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for (int i = 1; i < argc; i++) {
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human(atoi(argv[i]), dosuffix);
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}
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return 0;
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}
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